ABSTRACT
Chapter 9 contained a discussion of the analysis of two-way treatment structures having unequal subclass numbers using the means model. This chapter considers using an effects model in the same situation. All questions that can be answered by using the effects model can also be answered by using the means model, and vice versa. The effects model is being discussed because it is often an important tool when using statistical computing packages to analyze two-way treatment structures as statistical software is often programmed to automatically produce test statistics for main effects and interaction effects as well as estimates of marginal means, two-way means and their estimated standard errors.
